Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
506
FNUS75 KRIW 271209
FWSRIW
Spot Forecast for SVF-2B-7/8...USFS
National Weather Service Riverton WY
609 AM MDT Thu Mar 27 2025
Forecast is based on ignition time of 0700 MDT on March 27.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Mostly clear skies with light winds will prevail through the
morning today. Southwesterly winds are expected to start
increasing around 1300 this afternoon with periodic gusts of 20
to 30 mph. Winds will briefly shift to the north/northwest
starting around 1700-1900 before decreasing, returning to the
south/southwest by Friday morning. A nearing frontal passage will
bring increasing clouds throughout the afternoon and evening
today. The frontal passage will bring the chance (20-40%) for
some showers late this afternoon/evening starting around
1600-2000. Cooler temperatures and lighter winds are expected for
Friday along with increased chances for showers.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Sunny (20-30 percent) then becoming partly
sunny (65-75 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...10 percent.
Max temperature.....Around 55.
Min humidity........39 percent.
Wind (20 ft)........Light winds until 1300, then southwest 7 to 11
mph with gusts to around 20 mph.
Ridgetop wind.......East around 10 mph until 0800, then light until
1000, then east around 10 mph until 1100, then
south until 1500, then southwest 15 to 20 mph.
Mixing height.......2000 ft AGL until 1200, then 4000 ft AGL until
1400, then 5500 ft AGL until 1700, then 3500 ft
AGL.
Transport winds.....South 12 to 20 mph until 1500, then southwest
17 to 22 mph.
Smoke dispersal.....Poor until 1300, then fair until 1400, then
good early in the morning increasing to very
good in the afternoon until 1700, then fair.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 10 10 20 15 15 35 40 60 70 75
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 0 0 10 10 10
Temp............36 36 39 42 44 48 50 52 54 54 53
RH..............73 72 67 59 52 47 43 41 39 40 42
20 FT wind dir..E NE NE E SE S S SW SW SW SW
20 FT wind spd..3 2 2 3 4 6 7 10 11 10 8
20 FT wind gust.5 4 5 6 8 11 14 18 19 20 19
Ridge wind dir..E NE NE E SE S S SW SW SW SW
Ridge wind spd..10 5 5 10 10 10 15 15 20 15 15
Mix hgt (kft)...1.0 1.0 1.0 1.5 2.0 3.0 4.0 5.5 5.5 4.0 3.5
Transp wind dir.S S S S S S S SW SW SW S
Transp wind spd.14 14 12 13 13 13 17 20 22 18 17
SDspl kt-ft/100015 15 12 15 23 31 60 97 107 64 55
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
showers in the evening. Rain showers likely
overnight.
CWR.................9 percent.
Chance of pcpn......60 percent.
Chance of thunder...11 percent.
Min temperature.....Around 31.
Max humidity........90 percent.
Wind (20 ft)........Light winds until 2400, then northwest around 7
mph with gusts to around 13 mph until 0100,
then light.
Ridgetop wind.......Southwest 10 to 15 mph until 2000, then
northwest until 0200, then south until 0300,
then light.
Mixing height.......1000 ft AGL.
Transport winds.....South 9 to 15 mph until 2300, then northwest 7
to 14 mph.
Smoke dispersal.....Poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65 75 80 85 85 90 90 80 70 60 60 65
Weather cov..... SCH SCH CHC CHC LKY CHC SCH
Weather type.... RW RW RW RW RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Chc of pcpn (%).10 10 20 20 30 50 60 40 20 10 10 0
Chc of thdr (%).10 10 10 0 0 0 0 0 0 0 0 0
Temp............52 48 45 41 39 38 36 35 34 33 32 32
RH..............46 51 57 63 70 77 82 82 81 79 82 84
20 FT wind dir..SW W NW N N N NW W S S S SE
20 FT wind spd..6 5 4 4 5 6 7 6 4 2 2 2
20 FT wind gust.18 14 11 8 10 12 13 10 6
Ridge wind dir..SW W NW N N N NW W S S S SE
Ridge wind spd..15 10 10 10 10 15 15 10 10 5 5 5
Mix hgt (kft)...2.0 1.5 1.0 1.0 1.0 1.5 1.5 1.0 1.0 1.0 1.0 1.0
Transp wind dir.SW S S S W W N NW NW SW W W
Transp wind spd.15 12 12 9 13 13 14 12 9 8 7 7
SDspl kt-ft/100029 15 12 10 14 14 18 12 10 9 8 8
.FRIDAY...
Sky/weather.........Mostly cloudy (75-85 percent). Slight chance of
rain showers and snow showers late in the
morning. Chance of rain showers late in the
afternoon. Chance of snow showers late in the
afternoon.
CWR.................4 percent.
Chance of pcpn......50 percent.
Chance of thunder...6 percent.
Max temperature.....Around 46.
Min humidity........46 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds until 1200, then north around 10
mph until 1700, then light.
Mixing height.......2000 ft AGL until 1000. 5500 ft AGL after 1400.
Transport winds.....West around 7 mph until 0700, then south until
0800, then light until 1000, then southwest 7
to 13 mph until 1600, then west.
Smoke dispersal.....Poor until 1000. Poor early in the morning
increasing to good in the afternoon after 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........65 65 70 70 75 85 90 90 90 95 90 90
Weather cov..... SCH SCH SCH SCH CHC CHC CHC
Weather type.... RS RS RS RS RW RS RS
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 10 20 20 20 20 50 50 50
Chc of thdr (%).0 0 0 0 0 0 0 0 0 10 10 10
Temp............31 31 32 33 35 38 40 42 43 45 43 41
RH..............85 82 77 72 66 59 55 52 51 52 55 60
20 FT wind dir..SE S SW W W W NW NW N N N N
20 FT wind spd..2 2 1 1 2 2 3 3 3 3 3 2
20 FT wind gust. 2 2 5 6 6 6 5 4 4
Ridge wind dir..SE S SW W W W NW NW N N N N
Ridge wind spd..5 5 5 5 5 5 10 10 10 10 10 5
Mix hgt (kft)...1.0 1.0 1.0 2.0 3.0 3.5 4.0 4.5 5.0 5.5 4.5 4.0
Transp wind dir.W S S S S SW SW SW SW W W W
Transp wind spd.7 7 6 6 7 7 8 9 12 13 12 12
SDspl kt-ft/10008 8 6 10 17 20 28 36 50 61 47 39
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Mostly cloudy with snow showers likely and chance of showers.
Lows in the mid 20s. Highs around 40. Light winds.
.SUNDAY...
Mostly cloudy. Chance of snow showers. Lows around 20. Highs in
the lower 40s. Light winds.
.MONDAY...
Mostly cloudy with snow showers. Lows in the mid 20s. Highs in
the lower 40s. Light winds.
$$
Forecaster...Dziewaltowski
Requested by...WILL HALL
Type of request...PRESCRIBED
.TAG 2507914.1/RIW
.DELDT 03/27/25
.FormatterVersion 2.0.0
.EMAIL michael.mcewen@usda.gov,william.hall@usda.gov